Typical Characteristics (接下页)
Typical characteristics section is applicable for LM358B and LM2904B. The typical characteristics data section was taken with TS / 2 (unless otherwise noted). A = 25° C, VS = 36 V (±18 V), VCM = VS / 2, RLOAD = 10 kΩ connected to V
-75 -85
10k
100k
Frequency (Hz)
Channel Separation (dB) EMIRR (dB) -95 -105 -115 -125 -135 1k
90 84 78 72 66 60 54 48 42 36 30
1M
D008
24 1M
10M
100M Frequency (Hz)
1G
D007
图 37. Channel Separation vs Frequency
图 38. EMIRR (Electromagnetic Interference Rejection Ratio)
vs Frequency
20
7.12 Typical Characteristics（LM2904PWR/LM2904PT）
Typical characteristics section is applicable for LM158, LM158A, LM258, LM258A, LM358, LM358A, LM2904, and LM2904V. 0.36 20 18 0.34 –55C 16 0C 0.32 125C 14 0.3 12 10 0.28 8 0.26 5Vdc 6 15Vdc 0.24 4 30Vdc 0.22 2 0 0.2 0 5 10 15 20 25 30 –55 –35 –15 5 25 45 65 85 105 125 Temperature (° C) Supply Voltage (Vdc) Input Current (nAdc) Supply Current (mA) 图 39. Input Current vs Temperature 160 140 图 40. Supply Current vs Supply Voltage 100 90 80 70 60 50 40 30 20 10 0 0.1 CMRR RL=20K RL=2K aVoltage G(dB) n CMRR (dB) 120 100 80 60 40 20 0 0 5 10 15 20 25 30 V+ Supply Voltage (Vdc) 35 40 1 10 100 Avol 1000 Frequency (kHz) C001 图 41. Voltage Gain vs Supply Voltage 3.5 3.0 2.5 图 42. Common-Mode Rejection Ratio vs Frequency 0.50 0.45 0.40 0.35 0.30 0.25 0.20 VOUT (V) Voltage (V) 2.0 1.5 Voltage 1.0 0.5 0.0 0 4 8 12 16 20 0 2 4 6 Time ( s) 8 VOUT 24 28 32 36 40 10 Time ( s) C001 C001 图 43. Voltage Follower Large Signal Response (50 pF) 图 44. Voltage Follower Small Signal Response (50 pF)
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21
Typical Characteristics (接下页)
Typical characteristics section is applicable for LM158, LM158A, LM258, LM258A, LM358, LM358A, LM2904, and LM2904V. 8 20 Output Voltage (Vdc) relative to Vcc Output Swing (Vp -p) 17.5 15 7 6 5 4 12.5 10 7.5 5 2.5 0 1 10 100 Frequency (kHz) 图 45. Maximum Output Swing vs Frequency (VCC = 15 V) 5Vdc 15Vdc 30Vdc 1k 3 2 1 0.001 0.01 0.1 1 10 100 Output Sink Current (mAdc) 图 46. Output Sourcing Characteristics Output Current (mAdc) Voltage(Vdc)10 90 80 70 1 60 50 Output 40 0.1 0.01 0.001
0.01 0.1 1 Output Sink Current (mAdc) 10 30 20 10 0 –55 –35 –15 100 5 25 45 65 Temperature (°C) 85 105 125 图 47. Output Sinking Characteristics 图 48. Source Current Limiting 22
8 Parameter Measurement Information
900 Ω
VCC+
V
VI = 0 V
100 Ω
? +
V
VCC+ ?
+
O
VI
CC?
CL
R
L
RS
VO
V
CC?
图 49. Unity-Gain Amplifier
10 K
图 50. Noise-Test Circuit
VIN
– +18V
+
-18V
GND GND
图 51. Test Circuit, G = –1, for THD+N and Small-Signal Step Response
9 Detailed Description
9.1 Overview
这些器件由两个独立的高增益频率补偿运算放大器组成，这些运算放大器设计为可在很宽的电压范围内由单电源供电。 如果两个电源之间的电压差在“建议的工作条件”部分中指定的电源电压范围内，并且VS比输入共模电压高至少1.5 V，则也可以使用分离电源供电。 低电源电流消耗与电源电压的大小无关。
应用包括换能器放大器，直流放大模块以及所有常规运算放大器电路，这些电路现在可以在单电源电压系统中更容易地实现。 例如，这些设备可以直接用数字系统中使用的标准5V电源操作，并且可以轻松提供所需的接口电子设备，而无需额外的±5V电源。 9.2 Functional Block Diagram - LM358B, LM358BA, LM2904B, LM2904BA
VCC+
~6 μA
Current Regulator ~6 μA Current Regulator ~100 μA Current Regulator
IN-
OUT
IN+ 24
~120 μA
Current Regulator
TI运算放大器LM2904PWR,LM2904PT - 图文
